Transmitter for writing-telegraphs and the like.



A. RAPPENECKER.

TRANSMITTER FOR WRITING TELEGRAPHS AND THE LIKE.

APPLICATION FILED act. 21. 1913.

Patented Apr. 13, 1915.

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ALPHONS RAPPENEGKER, OF BREMEN, GERMANY.

TRANSMITTER FOR WRITING-TELEGRAPHS AND THE LIKE.

To all whom it may concern Be it known that L'Anrnions RAPPENEOKER, director, a subject of the German Emperor, residing at Bremen, Rolandhaus, Am Brill 8-12, Germany, have invented certain new and useful Improvements in Transmitters for VVriting-Telegraphs and the like; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to a transmitter de vice for copying and like telegraphic apparatus in which the movement of the writing pencil is resolved into two coordinate directions and converted into changes of electric resistance. In these transmitter devices the pencil is mounted on an oscillating lever, the pivot pin of which is secured to a carriage adjustable in the direction of the abscissze. Tn. order to convert the oscillating movements of the pencil into the direction of the ordinates, the pencil is also rectilinearly guided in the direction of the ordinates, and to equalize the deviations between this rectilinear guide and the are described by the pencil about its pivot pin, the pivot pin of the pencil lever must also allow of a movement of its own in the abscissa direction, on the carriage or slide adjustable in the direction of the abscissae. The arrangement must be however made in such a manner that the said mobility 01 the pivot pin of the pencil lever in the direction of the abscissw relatively to the slide should not be converted as an abscissa movement into changes of re sistance, but that only the oscillating move ments converted into the ordinate direction, should produce changes of resistance.

According to this invention, the movements of the pivot pin of the pencil lever relatively to the carriage in the direction of the abscissae are obtained by connecting the pencil lever to the carriage by means of a lever pivoted to the latter. This arrangement gives a specially easy mobility of the movement for equalizing between the are described by the pencil and the ordinate movement representing a chord ofthe said are.

A construction according to this invention is illustrated in the accompanying drawing in Figure 1 in side elevation, partly in section, and in Fig. 2 partly in a horizontal sec- Specification of Letters Patent.

Patented Apr. 13, 1915..

Application filed October 27, 1913. Serial No. 797,688;

tion on line 22 of Fig. '1, and partly in plan.

The pencil a which writes on the table u, is mounted on a lever 6 connected to the part 0 by a spring blade 3 which allows the pencil lever b and the pencil a to be raised and depressed. The writing table plate it rests on a casing to which carries by means of a plate 00, the carriage guides at and Rods a and a secured to the frame, carry a resistance-Z2 consisting of numerous windings.

The carriage itself comprises a longitudinal rod Z to which is secured in front a transverse spindle with rollers 0. The rod Z carries at its rear end a head or block 9 connected by lateral lugs h to a sleeve 2' which 'can slide in the longitudinal direction on the guide j. The rollers 0 travel between the rails 11,- and the contact rods m situated above. Tothe sleeve z is connected a contact 2. which, during the longitudinal movementof the carriage, switches in or out in a well known manner a larger or smaller number of the windings of the resistance is, and in that way produces changes of resistance corresponding to the abscissae movement of the pencil.

To the part 9 of the carriage is pivoted a pair of levers f rotatably connected to a sliding member f vertically adjustable on the bracket 6. The bracket 6 is used as a holder for the pencil lever which is pivoted with the stem or pillar 0 between pins of the bracket 6. To the stem 0 is connected a. rod (Z which is parallel to the pencil lever Z) and guided at the front end by means of a member a pivoted by a vertical pin and sliding on a straight bar g secured by means of the small brackets 79 to the carriage in transverse direction. On the sliding member is mounted a contact .9 sliding along the re-.

sistance r consisting of numerous windings and thus producing in well known manner changes of resistance during the ordinate movement.

, In writing with the pencil a all the movemerits of the pencil in the direction of the abscissae, are transmitted by means of the parts .7) 0 (Z q p to the carriage, and therefore to the contact 25, and in that way changes of resistance corresponding to the movement in the direction of the abscissae are produced. The rod (Z participates however in the oscillating movements of the pencil a as the said rod is rigidly connected V equalized.

in the transverse direction to the writing lever by means of the part c. As however the. front end of the rod, d is guided by means of the sliding member 0) in a rectilinear manner on the rod g, the deviation between the said rectilinear guiding and the arc movement of the pencil a must be This is effected by the pencil lever 6 together with the parts 0 and d be.- ing connected to the carriage not directly but by' means of the oscillating lever Consequently, and as the rod d isrotatably connected to the sliding member 4) when the'pencil aoscillates, the pencil holder 0,

can make a movement in'the direction of;

v the abscissae' relatively tothe carriage, corresponding to the difference between the arc of oscillation of the pencil a and the chord determined by the guide 7. This movement, although it takes place in the direction of the abscissae, is not converted into a change of resistance at the resistance is, as the sleeve z' with the whole carriage, does not then make any movement. During the "oscillation of the pencil a about its axis, there only takes place therefore a conversion ofthe ordinate movement into a change of resistance. The movement of the pencil lever relatively-to the carriage takes place easily'in the present arrangement, as only f.- movable carriage, a pivotally mounted penci'l lever, an electric resistance varied by unitary movements of the pencil lever and carriage in the direction of the abscissae, and a second electric resistance associated with the pencil lever and carriage disposed substantially at right angles to the first-named resistance and varied by movements of the pencil in the direction of the ordinates, of a link pivotally associated with the pencil lever near its axis of oscillation and pivotally connected with the carriage, for the purpose described.

In testimony whereof I have afiixed my signature, in presence of two witnesses.

ALPHONS RAPPENECKER.

Witnesses:

c HENRY HAsPER,

VVOLDEMAR IIAU'PT.

Copies of this patent may beobtained'for five cents each, by addressing the Commissioner of Patents,

Washington, D. G." 

